Book excerpt: How do we heat our homes, light our rooms, and power our cars? With energy! In 2014, the United States relied on fossil fuels for about 67 percent of its power. But as the fossil fuel supply dwindles and climate change becomes an increasingly urgent issue, individuals, businesses, and governments are expanding their sources of renewable energy, including solar, wind, biofuel, hydro, and geothermal. In Renewable Energy: Discover the Fuel of the Future, readers ages 9 to 12 learn about these renewable energy sources and discover how sunshine can be used to power light bulbs and how the earth's natural heat can be used to warm our houses. Young readers weigh the pros and cons of different energy sources and make their own informed opinions about which resources are the best choices for different uses. Renewable energy industries provide a booming field for future scientists and engineers. This book shows kids these future jobs and gets them excited about contributing to a world run on clean energy. Hands-on projects, essential questions, links to online primary sources, and science-minded prompts to think more about energy, the environment, and the repercussions of our choices make this book a key addition to classrooms and libraries.